The singer - who is engaged to Rochelle Wiseman from The Saturdays - was snapped handcuffed to little person 5 Cent and wearing a very fetching bikini t-shirt as he walked through the streets of Sin City with his stag party - and his bandmates have plenty more up their sleeves.

Aston, Oritsé and JB have promised him the stag do to end all stag dos after recruiting a former member of MI5 to help with the planning of the 8-day bender as payback for surprising Oritsé with a topless 'Grannygram' on his birthday.